Initial Setup of Navio2
Had some trouble getting PWM to PPM to work correctly in Ardupilot Flight Planner, all working once APM 3.4-dev was installed on the Pi.
FS-IA10 -> S2PW Signal Converter Module -> EMLID Navio2 (Raspberry Pi 3).
Useful command to read throttle setting from the Raspberry Pi,
sudo cat /sys/kernel/rcio/rcin/ch2